论文部分内容阅读
为在基坑支护中采用玻璃纤维复合材料(GFRP)腰梁取代传统材料腰梁,进行了材料性能试验和工字形、双背槽形两种截面形式梁的受弯试验,对GFRP梁的受力性能和破坏形态进行了研究。试验结果表明,材料性能、构件的稳定性以及腹板和翼缘连接处的局部受压应是GFRP构件设计分析的主要内容。复合材料腰梁截面形式的优化选取既要考虑满足稳定性要求,又要充分发挥材料的强度特性,整合后的双腹工字形是比较适宜的截面形式。腰梁和锚杆连接处需采取局部加强措施。
In order to replace the traditional material waist beam with the GFRP waist beam in the foundation pit support, the material performance test and bending test of the beam with two cross-section shapes of I-shape and double-groove are conducted. Mechanical properties and damage morphology were studied. The experimental results show that the material properties, the stability of the components and the local compression of webs and flange connections should be the main contents of GFRP component design and analysis. The optimal selection of the cross-section of the composite beam should not only meet the requirements of stability, but also give full play to the strength characteristics of the material. The integrated double-abdomen I-shape is a suitable cross-sectional form. Lumbar beam and bolt joints need to take local reinforcement measures.